Published in 1913, El Dorado was the fourth in the Pimpernel series of eleven books, numerous short stories and other related writings about her famous British adventurer. However, Orczy did not always follow a strict chronological sequence while publishing the novels and hence, there is plenty of overlap between the time frames of the stories. El Dorado is famous for its being the basis on which most of the film and stage adaptations of The Scarlet Pimpernel have been based.